Reversing valve for furnaces



.lune 24 1924. 1,499,017

H. HELLAN REVERSI-NG VALVE FOR FURNACES Filed July ll, 1922 2 Sheetg-Shee` 1 y F1o'. 1

E INVENTOR. y.: I I :In 77171,/ K

111111224 1924. 1,499,017 H. HELLAN f f REVERSING VALVE -FOR AFURNACES Filed July 11, 1922 2 'sheets-sheet 2 FIG; 6

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Patented .lune 24, 1924.

HAAKON HELLAN, 0F BELLEVUE, EENNSYLVANIA.

REVERSING VALVE FOR FUR/HACES.

Application filed JulyA 11, 1922.

To @ZZ who-m t may concern:

Y Be it known that I, Hannon HELLAN, ra citizen of the United States, residing at Bellevue, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in Reversing haust outlets are opened, and may close the latter before the former are opened to p-revent the gas and air from shortcircuiting to the stack.' Another object is to provide novel means for operating theV valves, and limiting their throws so that they can not engage their seats when closing. @ther objects appear hereinafter.

Referring to the accompanying drawings, Fig. 1 is a central vertical section of a gascontrolling valve constructed in accordance with my invention; Fig. 2, a similar section of an air-controlling valve embodying the principles of my invention; Fig. V3, a vertical section showing a modification of Fig; 1; Fig. 4, a. similar section of a modification of Fig. 2; Fig. 5, a section showing ainodiiication of Fig. 1; Fig. 6, a central vertical section through a series of Vtwo gas and'two air controlling valves, the view showingthe valve-operating mechanism in side elevation; and Fig. 7, a top plan view of the said operating mechanism and of the upper parts of the valves and the connection between thel gas valves, `some of the parts being slightly rearranged. A n

Referring first to Fig. 1, I show a single gas-controlling structure having the inlet box 1 and the outlet box 2 separated by the annular water-cooled box 3, on the internal flange 4; of which the pendant ring 5 is loosely hung by its external flange 6, which isspaced from the wall of the box 2 into which the ring 5 depends. Directly below the ring 5 andk seated at the bottom of the box 2 is the annular trough 7 open upwardly and provided at one side neanits bottom with an opening 8 leading to the lip or cup 9 having an overiiow into the receptacle 10 Serial No. 574,189.

having the outlet pipe 11 which may lead to a sewer or other place of deposit.

12 is an annular upwardly-open trough containing a tar seal 78 and detachably hung on the periphery of the hollow valve body 13 operated by the hollow stem 14 which extends up through the boxes 1 and 2 and above the yformer where it hasa watertight connection with the chamber-15 in the head 16, the chamber having an outlet pipe 17 emptying into the central water-holding compartment 18 on the top casting 19 for the box 1. into the compartment 20 surrounding the former and having an overflow notch 21 which deposits the water into the receptacle 22 having the outlet pipe 23. Water is sup plied to the valve-body 13 by the pipe 24V which conducts water to the' chamber 25 in the head 16 and above the chamber 15, the water being conducted from the chamber 25 by the pipe 26 which extends Athrough the chamber v15 and the hollow stem 1li and discharges into the valve body 13. Preferably the trough 12 is held from moving oif from the valve-body 13 by keys 27.V rllheV I i bottom ofthe casting 19 has the central opening' 28 from which depends the annular water-trough or pocket v29 4having its outer wall lush with the bottom of the compartment 18 and its inner wall extending above the top of the said compartment. The stem 14 works vertically in the tubular. passage formed by the said inner wall. The head 16 has the'pipe 30 screwed into its lower The compartment 18 overiiows cov end, and extends down into the pocket 29,

the pipe and pocket being of such depths as to maintain a constant water-seal between the box 1 and the atmosphere 'at all positions of the gas-valve which consists of the valve body 13 and the trough 12.

Water passes from the pipep2t through the chamber 25, the pipe 26, the valve-body 13, the stem 14C, the chamber 15, the pipe 17, the compartments 18 and 20, the notch 21, the receptacle 22 and the pipe 23.

Water in the compartment 18 supplies water to the trough or pocket 29 to seal the pipe 30 so that gasin the box 1 can not escape from the space between the stem 14 and the pocket 29.

31 is the port for admitting fuel gas to the box 1, and 32 is the port by which fuel gas leaves the box2 on its way to the furnace (not shown), and by which the waste 41A above the valve 47.

gases from the furnace enter the box 2. 33 is the port by which the waste gases travel from the box 2 on their way to the flue 34 leading to the branch stack flue 35. The box 3 and the trough 7 may be supplied with water from any source.

Referring now to Fig. 2, 36 represents an air-receiving box having on its top the water trough 37 which carries the spider 33 having the air-passages or ports 39 and the central hub 40, in which the vert-ical valvestem 41 is slidable. 42 is a plate which may be placed over part of the inlet opening 39 to regulate the air supply. The stem 41 supports at itsy lower end the cup-like valve 43 whose annular flange may be suspended in the annular water trough 44 forming the )ort 45 for the waste gases which enter the branch stack flue through the flue 46.

47 is a second cup-like valve slidable on the stem 41 above the trough 37 and having its flange arranged to enter the trough 37 to form a water seal. The top of the valve 47 carries a number of sheaves 43 and the frame 49v carries above the valve a number of sheaves 50. 'A number of chains 51 have eachone of their ends attached to the stem Each chain passes over one sheave 50 and under one sheave 48 and is attached to the frame 49.

52 is the outlet port for the box 36.

For use with regenerative furnaces I prefer t0 arrange two air valves and two gas valves in line as shown on Figs. 6 and 7. The gas ports 31 of the adjacent gas boxes 1 communicate with the gas-supply passage 53 which is to be connected` t0 gas regenerators (not shown). rlhe lower end of the passage 53 has a valve 54 by the opening of which dust may pass into the receptacle 55 below.

56 is a motor which drives the worin 57 meshing with the worm-pinion 58 on the shaft 59, the latter having the crank 60 connected by the link 61 to the rocking segment- 62 turning` on the axis 63. Four ropes 64, 65, 66, and 67 work on the periphery of the segment, the left hand ropes 64 and 65 being attached to the right hand end of the periphery, and the right hand ropes being attached to the left hand ends of the periphery. The rope 64 is attached to left hand head 16 and runs on the sheaves 68 and 69, and the rope 66 is attached to the right hand head 16 and runsvon the sheaves 70 and 71. Therope is attached to the left hand stem 41 and runs on the sheaves 72 and 73, and the rope 67 is attached to the right hand stem 41 and runs on the sheaves A74 and 75.

The waste gases from the tlues 34 and 46 enter the tlues 35 which lead to the main stack-flue 76.

The lengthof the chains 51 is such that either valve `43 or 47 may be in its respective trough 44 or 37 when the other valve is at its maximum distance away from its seat. The valves 47 must be less than double the weight of the valves 43 and have but half the travel of the latter, owing to the arrangement of the chains as hereinbefore described. The throw of the segment: 62 is limited positively in each direction by the dead-center positions of the crank 60 and the link 61, and its throw to theleft, as shown on Figs. 6 and 7, (1) lifts the right hand gas valve trough 12 from its sealing trough 7 and moves it up to its sealing connection with the ring 5; lowers the left gas-valve trough 12 from its seal with the ring 5 to its seal with the trough 7: (3) lifts the right hand air valve from its seal with the trough 44 and lowers the corresponding air valve 47 to its seal with the trough 37; and (4) lowers the left hand air valve 43 to its seal with the trough 44 and lifts the corresponding valve 47 from its seal with the` trough 37. lVhen the crank 60 and the link are in line with their connections with the shaft 59 and the pivot 77 which connects the link to the segment 62, none of the valves can contact with the bottoms of their respective sealing troughs, thereby preventing damage to the valves and troughs.

With the parts positioned as shown on Figs. 6 and 7 fuel gas passes from the passage 53 through the port- 31 of the left hand gas valve and thence through its ring 5 and port 32 on its way to the furnace; air passes under the left hand valve 47 to vthe box and thence through the port 52 on its way to the furnacej` and waste gases from the furnace enter the right hand boxes 2 and 36, whence they pass/down to the corresponding branch stack flue on their way to the main stack flue 76.

Upon the operation of the motor to throw the crank 13() degrees, the valves` are all. shifted .so that they occupy the alternate positions from those shown on Fig. 6, whereupon air and fuel gas enter the right hand boxes 36 and 1 and the waste gases escape to the stack through the lett hand boxes 36 andr2.

It is to be noted that the sealingl troughs 12 have no means for supplying them with water, but that each is filled with tar prior to its initial operation, the filling being done through the door 79. The solid tar in the troughs 12 will soon melt, and yeven if the trough with the solid tar should engage a ring 5, no harm would result because the ring would be lifted from its seat byr its engagement with the tar. Tar is supplied to the troughs 12 by condensation of the same from the fuel gas by reason of the contact of the latter with the water-cooled valve body 13, stems 14 and pockets or wells 29. Any surplus tar owing over the troughs 12 drops into the troughs 7 and escapes therefrom. In Fig. 3, the depending flange of the ring 5 and the troughs 7EL and 12a are of such depths that one sealing connection is not broken until the alternate sealing connection is made.

In 'Fig 4, the depths of the water-seal troughs 37 and 44, and of the depending iianges of the air valves 43a and 47a are such as to prevent a break of the water seals during the transition changes of the valves.

In Fig. 5, I show the tar-sealing trough 12b having but slight depth but provided with a depending sealing iiange 8O for the trough 7l. The ring 5b has also a reduced depth.

The boxes l and 36 have the respective inspection doors 81 and 82 opposite their respective ports 31 and 52.

I claiml. In a gas-valve structure, a hollow gasvalve body, means for causing a'cooling fluid to pass through it, an upwardly-open sealing trough carried thereby and provision whereby only liquid condensed from the gas Y contacting with the said body may iow into the trough.

2. In a gas-valve structure, a hollow gasvalve body, means for causing a cooling iiuid to pass through it, an upwardly-open sealing trough carried thereby and detachably connected thereto, and provision whereby only liquid condensed from the gas contacting with the said body may flow into the trough.

3. In a gas-valve structure, a hollow gasvalve body, a hollow body-operating stem communicating with the hollow of the body, means for causing a cooling fluid to pass through it, an upwardly-open sealing trough `carried by the body and provision whereby only liquid condensed from the gas contacting with the said body and stem may flow into the trough.

4. In a gas-valve structure for regenerative furnaces, a chamber having a fuel-gas inlet port, a waste port, and a furnaceconnecting port, a sealing trough surrounding the waste port, a freely upwardlymovable ring between the gas inlet port and the other two ports and concentric with the said trough, a hollow valve-body, a sealingliquid collecting and containing trough carried by the valve-body and arranged to project in one position into the first trough and in another position to receive the said ring, a sealing-liquid in the first trough, and means for causing a flow of a cooling liquid to and from the hollow of the valve-body, the said first trough receiving only liquid condensed from the fuel gas by its contact with the valve-body during its passage from the first to the third port.

5. In a reversing-valve structure, plural gas-controlling valves having upper and lower sealing positions, means including liquid-containing sealing troughs for sealing 'the valves at each of said positions, means for moving the valves simultaneously in opposite direction to their sealing positions, a power-supplying means operating the valves, including a crank so arranged as to cause the said means to be suspended free of contact with their sealing companions when the said crank is at its dead-center positions, in combination with plural aircontrolling valves with upper and lower sealing-trough provisions, and connections from the latter valves to the said crank whereby the said latter valves are suspended free of Contact with their sealing companions when the said crank is in its dead-center positions.

6. In an air-valve structure for furnaces, two valves movable in opposite directions, a rod to the lower end of which one valve is attached, and on which the other valve is slidable, a system of cords and pulleys connecting the rod and the valve which is slidable thereon, for supporting and operating the valves in unison, and means for controlling the actuation of the valves.

7. In an air-valve structure for furnaces, two valves movable in opposite directions, a rod to the lower end of which one valve is attached, and on which the other valve is slidable, a multiple system of cords and pulleys connecting the rod and the valve which lis slidable thereon, for supporting and operating the valves in unison, the number of cords in each system exceeding two, and means for controlling the actuation of the valve.

8. In a valve structure for furnaces, a central valve body, and a detachable sealing ring carried thereby. f

Signed at Pittsburgh, Pa., this 8th day of July, 1922.

HAAKON HELLAN. 

